Which biomarker is most sensitive for detecting myocardial infarction?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $25.99Unlock all

Study for the NATA BOC Domain 2 Clinical Evaluation and Diagnosis Test. Utilize our comprehensive flashcards and multiple-choice quiz features; each question comes with hints and thorough explanations. Prepare effectively for your certification exam!

Multiple Choice

Which biomarker is most sensitive for detecting myocardial infarction?

Explanation:
Cardiac troponin I and troponin T are the most sensitive and specific biomarkers for myocardial infarction. When heart muscle is damaged, these proteins are released into the bloodstream, and their cardiac specificity means elevations point to cardiac injury rather than injury to skeletal muscle. They rise within a few hours after onset (about 3–4 hours), peak around 18–24 hours, and stay elevated for several days, which makes them reliable for diagnosing MI across different presentations. This sensitivity and specificity outperform other markers: myoglobin rises very early but is not heart-specific, CK-MB is useful but less sensitive and specific than troponin, and LDH is later and less specific.

Cardiac troponin I and troponin T are the most sensitive and specific biomarkers for myocardial infarction. When heart muscle is damaged, these proteins are released into the bloodstream, and their cardiac specificity means elevations point to cardiac injury rather than injury to skeletal muscle. They rise within a few hours after onset (about 3–4 hours), peak around 18–24 hours, and stay elevated for several days, which makes them reliable for diagnosing MI across different presentations. This sensitivity and specificity outperform other markers: myoglobin rises very early but is not heart-specific, CK-MB is useful but less sensitive and specific than troponin, and LDH is later and less specific.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy